A fortress rising from the St. Lawrence. Dark Island's Singer Castle is one of the most dramatic Gilded Age landmarks in the Thousand Islands — a medieval-style castle built for a sewing machine heir and now open for guided tours.
Dark Island has no traditional cruise terminal — ships anchor in the St. Lawrence and tender passengers ashore to the castle's private dock.
💡 Pro move: The island itself is small and privately owned. Singer Castle is the primary destination — there is no town, beach, or shops on the island.
Dark Island's dock is a private facility at Singer Castle, used by cruise tenders and commercial tour boats.
| Cruise Line | Typical Berth / Arrival | Dock or Tender |
|---|---|---|
| American Cruise Lines / small expedition ships | Singer Castle private dock, south side of island📍 | Tendered |
| Commercial tour boats (Uncle Sam Boat Tours, etc.) | Downstream end of Singer Castle dock📍 | Tendered |
With just one main sight on a small island, the focus is entirely on Singer Castle — but it's a genuinely spectacular one.
Explore the Gothic Revival fortress built by Frederick Bourne (president of Singer Sewing Machine Co.) in 1905. The 28-room castle features secret passages, a dungeon, spy holes, and original furnishings — one of the most authentic Gilded Age interiors in the Northeast.
Book Singer Castle tours →Many cruise itineraries pair Dark Island with a narrated pass through the archipelago — 1,864 islands straddling the US-Canada border. Spot Boldt Castle on Heart Island, millionaires' retreats, and the famous '1000 Islands' salad dressing birthplace.
Find Thousand Islands boat tours →A short boat ride away, Boldt Castle on Heart Island is the other great Thousand Islands landmark — built as a Valentine's gift by hotel magnate George Boldt. Often combined with Dark Island visits.
Find Boldt Castle tours →Dark Island is tiny — the 'walk' is simply exploring the castle grounds and enjoying the river views.
From the dock, walk around the castle exterior, take in river views, and photograph the dramatic stone towers. After your tour, the entire island perimeter can be walked in minutes.
📍 Open in MapsClimate normals for Dark Island, New York, USA (2014–2023 averages). Pack for the month you sail — highs, lows, and how many rainy days to expect.
| Month | Avg High | Avg Low | Rainy Days | Sunrise | Sunset |
|---|---|---|---|---|---|
| Jan | 28°F / -2°C | 13°F / -11°C | 15 | 7:30 AM | 5:57 PM |
| Feb | 31°F / -1°C | 15°F / -9°C | 14 | 7:13 AM | 6:23 PM |
| Mar | 40°F / 4°C | 24°F / -4°C | 13 | 7:43 AM | 7:42 PM |
| Apr | 53°F / 12°C | 35°F / 2°C | 12 | 7:07 AM | 8:01 PM |
| May | 66°F / 19°C | 46°F / 8°C | 12 | 6:41 AM | 8:20 PM |
| Jun | 75°F / 24°C | 55°F / 13°C | 11 | 6:33 AM | 8:36 PM |
| Jul | 79°F / 26°C | 62°F / 17°C | 11 | 6:44 AM | 8:36 PM |
| Aug | 77°F / 25°C | 61°F / 16°C | 11 | 7:02 AM | 8:14 PM |
| Sep | 70°F / 21°C | 53°F / 12°C | 12 | 7:19 AM | 7:39 PM |
| Oct | 57°F / 14°C | 42°F / 6°C | 13 | 7:36 AM | 7:03 PM |
| Nov | 45°F / 7°C | 32°F / 0°C | 14 | 6:59 AM | 5:38 PM |
| Dec | 34°F / 1°C | 21°F / -6°C | 15 | 7:22 AM | 5:36 PM |
Source: Open-Meteo ERA5 (10-yr daily averages)
Transport options from the pier — taxis, shuttles, transit passes, and whether ride-share apps work here.
The primary way to reach Dark Island is by boat. The Schermerhorn Harbor Shuttle runs seasonally (Wed–Sat, June–August) from Hammond, NY, directly to Singer Castle.
Departing from Alexandria Bay, NY, these tours offer cruises that visit Singer Castle on Dark Island. Various cruise lengths and formats available.
Operating from Rockport, Ontario (Canada), offering 3-hour and 6-hour tours that include Singer Castle. The 6-hour stopover requires a passport.
1000 Island Taxi serves the Clayton, Alexandria Bay, and surrounding area for mainland transfers. Contact them directly for pricing to your harbor departure point.